/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:01:49,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:01:49,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:01:49,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:01:49,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:01:49,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:01:49,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:01:49,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:01:49,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:01:49,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:01:49,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:01:49,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:01:49,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:01:49,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:01:49,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:01:49,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:01:49,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:01:49,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:01:49,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:01:49,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:01:49,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:01:49,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:01:49,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:01:49,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:01:49,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:01:49,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:01:49,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:01:49,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:01:49,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:01:49,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:01:49,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:01:49,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:01:49,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:01:49,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:01:49,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:01:49,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:01:49,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:01:49,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:01:49,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:01:49,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:01:49,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:01:49,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:01:49,212 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:01:49,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:01:49,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:01:49,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:01:49,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:01:49,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:01:49,214 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:01:49,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:01:49,214 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:01:49,214 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:01:49,215 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:01:49,215 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:01:49,215 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:01:49,215 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:01:49,215 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:01:49,216 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:01:49,216 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:01:49,216 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:01:49,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:01:49,216 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:01:49,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:01:49,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:01:49,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:01:49,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:01:49,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:01:49,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:01:49,217 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:01:49,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:01:49,218 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:01:49,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:01:49,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:01:49,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:01:49,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:01:49,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:01:49,218 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:01:49,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:01:49,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:01:49,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:01:49,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:01:49,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:01:49,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:01:49,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:01:49,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:01:49,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:01:49,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:01:49,438 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:01:49,439 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:01:49,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label34.c [2023-04-01 04:01:50,372 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:01:50,806 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:01:50,807 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label34.c [2023-04-01 04:01:50,832 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d51e6c3/eb92c974e4b747feb8c91b229d3032b4/FLAG92ac4f1c8 [2023-04-01 04:01:50,846 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d51e6c3/eb92c974e4b747feb8c91b229d3032b4 [2023-04-01 04:01:50,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:01:50,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:01:50,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:01:50,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:01:50,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:01:50,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:01:50" (1/1) ... [2023-04-01 04:01:50,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab3f90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:50, skipping insertion in model container [2023-04-01 04:01:50,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:01:50" (1/1) ... [2023-04-01 04:01:50,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:01:50,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:01:51,112 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label34.c[2340,2353] [2023-04-01 04:01:51,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:01:51,707 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:01:51,727 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label34.c[2340,2353] [2023-04-01 04:01:52,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:01:52,048 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:01:52,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52 WrapperNode [2023-04-01 04:01:52,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:01:52,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:01:52,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:01:52,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:01:52,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:01:52,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:01:52,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:01:52,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:01:52,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (1/1) ... [2023-04-01 04:01:52,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:01:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:01:52,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:01:52,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:01:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:01:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:01:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:01:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:01:52,390 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:01:52,391 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:01:55,361 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:01:55,875 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:01:55,875 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:01:55,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:01:55 BoogieIcfgContainer [2023-04-01 04:01:55,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:01:55,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:01:55,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:01:55,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:01:55,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:01:50" (1/3) ... [2023-04-01 04:01:55,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100559c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:01:55, skipping insertion in model container [2023-04-01 04:01:55,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:01:52" (2/3) ... [2023-04-01 04:01:55,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100559c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:01:55, skipping insertion in model container [2023-04-01 04:01:55,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:01:55" (3/3) ... [2023-04-01 04:01:55,884 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label34.c [2023-04-01 04:01:55,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:01:55,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:01:55,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:01:55,953 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23c69f07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:01:55,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:01:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:01:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:01:55,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:55,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:01:55,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:55,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash 832849634, now seen corresponding path program 1 times [2023-04-01 04:01:55,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:55,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604271676] [2023-04-01 04:01:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:55,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:01:56,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:56,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604271676] [2023-04-01 04:01:56,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604271676] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:56,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:01:56,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:01:56,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633668035] [2023-04-01 04:01:56,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:56,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:01:56,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:56,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:01:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:01:56,214 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:01:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:01:59,080 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:01:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:01:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:01:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:01:59,097 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:01:59,097 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:01:59,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:01:59,106 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:01:59,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:01:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:01:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:01:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.9348148148148148) internal successors, (2612), 1350 states have internal predecessors, (2612), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:01:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions. [2023-04-01 04:01:59,204 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11 [2023-04-01 04:01:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:01:59,205 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions. [2023-04-01 04:01:59,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:01:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions. [2023-04-01 04:01:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:01:59,207 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:01:59,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:01:59,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:01:59,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:01:59,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:01:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1487865917, now seen corresponding path program 1 times [2023-04-01 04:01:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:01:59,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112848434] [2023-04-01 04:01:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:01:59,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:01:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:01:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:01:59,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:01:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112848434] [2023-04-01 04:01:59,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112848434] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:01:59,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:01:59,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:01:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461412974] [2023-04-01 04:01:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:01:59,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:01:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:01:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:01:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:01:59,426 INFO L87 Difference]: Start difference. First operand 1368 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:02,885 INFO L93 Difference]: Finished difference Result 4148 states and 8004 transitions. [2023-04-01 04:02:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:02:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-04-01 04:02:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:02,896 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 04:02:02,896 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 04:02:02,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:02:02,899 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:02,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:02:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 04:02:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-01 04:02:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.6973829708809436) internal successors, (4605), 2717 states have internal predecessors, (4605), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 04:02:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions. [2023-04-01 04:02:02,971 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29 [2023-04-01 04:02:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:02,971 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions. [2023-04-01 04:02:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions. [2023-04-01 04:02:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 04:02:02,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:02,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:02:02,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:02:02,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:02,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash -749252576, now seen corresponding path program 1 times [2023-04-01 04:02:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:02,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824629112] [2023-04-01 04:02:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:02,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:02:03,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824629112] [2023-04-01 04:02:03,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824629112] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020007510] [2023-04-01 04:02:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:03,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:03,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:02:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:02:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:03,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:02:03,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:02:03,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:02:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020007510] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:03,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:02:03,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:02:03,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354581610] [2023-04-01 04:02:03,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:02:03,378 INFO L87 Difference]: Start difference. First operand 2755 states and 4682 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:02:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:07,042 INFO L93 Difference]: Finished difference Result 8445 states and 14563 transitions. [2023-04-01 04:02:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:02:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-04-01 04:02:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:07,067 INFO L225 Difference]: With dead ends: 8445 [2023-04-01 04:02:07,067 INFO L226 Difference]: Without dead ends: 5695 [2023-04-01 04:02:07,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:02:07,074 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2315 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4336 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 4336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:07,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 94 Invalid, 5311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 4336 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:02:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-04-01 04:02:07,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583. [2023-04-01 04:02:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5460 states have (on average 1.4923076923076923) internal successors, (8148), 5483 states have internal predecessors, (8148), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (350), 72 states have call predecessors, (350), 26 states have call successors, (350) [2023-04-01 04:02:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8525 transitions. [2023-04-01 04:02:07,209 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8525 transitions. Word has length 43 [2023-04-01 04:02:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:07,210 INFO L495 AbstractCegarLoop]: Abstraction has 5583 states and 8525 transitions. [2023-04-01 04:02:07,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:02:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8525 transitions. [2023-04-01 04:02:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:02:07,211 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:07,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:02:07,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:02:07,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:07,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:07,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1821536828, now seen corresponding path program 1 times [2023-04-01 04:02:07,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:07,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023756739] [2023-04-01 04:02:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:07,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:02:07,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:07,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023756739] [2023-04-01 04:02:07,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023756739] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:07,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:02:07,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:02:07,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907823916] [2023-04-01 04:02:07,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:07,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:07,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:02:07,552 INFO L87 Difference]: Start difference. First operand 5583 states and 8525 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:11,611 INFO L93 Difference]: Finished difference Result 17084 states and 27304 transitions. [2023-04-01 04:02:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:02:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-04-01 04:02:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:11,657 INFO L225 Difference]: With dead ends: 17084 [2023-04-01 04:02:11,658 INFO L226 Difference]: Without dead ends: 11506 [2023-04-01 04:02:11,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:02:11,678 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:11,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 04:02:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-04-01 04:02:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063. [2023-04-01 04:02:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 10731 states have (on average 1.3303513186096356) internal successors, (14276), 10821 states have internal predecessors, (14276), 51 states have call successors, (51), 51 states have call predecessors, (51), 280 states have return successors, (1406), 190 states have call predecessors, (1406), 50 states have call successors, (1406) [2023-04-01 04:02:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15733 transitions. [2023-04-01 04:02:12,016 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 15733 transitions. Word has length 42 [2023-04-01 04:02:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:12,017 INFO L495 AbstractCegarLoop]: Abstraction has 11063 states and 15733 transitions. [2023-04-01 04:02:12,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 15733 transitions. [2023-04-01 04:02:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 04:02:12,023 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:12,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:02:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:02:12,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:12,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1531438609, now seen corresponding path program 1 times [2023-04-01 04:02:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:12,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254567553] [2023-04-01 04:02:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:02:12,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:12,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254567553] [2023-04-01 04:02:12,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254567553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:12,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729215591] [2023-04-01 04:02:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:12,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:12,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:02:12,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:02:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:12,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:02:12,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:02:12,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:02:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729215591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:12,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:02:12,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:02:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131347208] [2023-04-01 04:02:12,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:02:12,454 INFO L87 Difference]: Start difference. First operand 11063 states and 15733 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:02:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:16,140 INFO L93 Difference]: Finished difference Result 28698 states and 43622 transitions. [2023-04-01 04:02:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:02:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 80 [2023-04-01 04:02:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:16,232 INFO L225 Difference]: With dead ends: 28698 [2023-04-01 04:02:16,232 INFO L226 Difference]: Without dead ends: 17640 [2023-04-01 04:02:16,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:02:16,257 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:16,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:02:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2023-04-01 04:02:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650. [2023-04-01 04:02:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16138 states have (on average 1.3328169537737018) internal successors, (21509), 16283 states have internal predecessors, (21509), 76 states have call successors, (76), 76 states have call predecessors, (76), 435 states have return successors, (3154), 290 states have call predecessors, (3154), 75 states have call successors, (3154) [2023-04-01 04:02:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24739 transitions. [2023-04-01 04:02:16,672 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 24739 transitions. Word has length 80 [2023-04-01 04:02:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:16,674 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 24739 transitions. [2023-04-01 04:02:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:02:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 24739 transitions. [2023-04-01 04:02:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 04:02:16,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:16,677 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:02:16,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:02:16,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:16,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:16,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1808877892, now seen corresponding path program 1 times [2023-04-01 04:02:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:16,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390195038] [2023-04-01 04:02:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 04:02:17,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390195038] [2023-04-01 04:02:17,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390195038] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681966101] [2023-04-01 04:02:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:17,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:17,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:17,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:02:17,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:02:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:17,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:02:17,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:02:17,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:02:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 04:02:17,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681966101] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:02:17,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132528902] [2023-04-01 04:02:17,534 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 04:02:17,534 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:02:17,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:02:17,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:02:17,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:02:17,646 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:02:17,741 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 04:02:17,772 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5157 conjuctions. This might take some time... [2023-04-01 04:02:17,992 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 313 conjuctions. [2023-04-01 04:02:29,675 WARN L223 SmtUtils]: Spent 8.39s on a formula simplification that was a NOOP. DAG size: 845 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)